Discrete resource allocation in visual working memory.

Discrete resource allocation in visual working memory.
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DOI:
10.1037/a0015792
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发表时间:
2009-10
影响因子:
2.1
通讯作者:
Awh, Edward
Awh, Edward
中科院分区:
心理学3区
文献类型:
--
作者:
Barton, Brian;Ester, Edward F.;Awh, Edward

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视觉工作记忆中的资源是以连续还是离散的方式分配的?一方面,灵活的资源模型表明,能力是由一个中央资源库确定的,可以灵活地划分,以便更复杂的项目获得更大的资源份额。另一方面,如果工作记忆的容量是以离散的存储“槽”来定义的,那么观察者可能能够确定哪些项目被分配到一个槽中,但不能确定资源如何在存储的项目之间分配。为了测试这些预测,我们操纵了要存储的项目的相对复杂性,同时保持项目数量不变。虽然记忆的分辨率下降时,设置大小增加(实验1),分辨率为一个给定的项目是不受影响的其他项目的复杂性的大变化时,设置大小保持不变(实验2-4)。因此,视觉工作记忆中的资源分布在一个离散的槽为基础的方式,即使当项目间的复杂性变化激励跨项目的资源的不对称分工。
Are resources in visual working memory allocated in a continuous or a discrete fashion? On the one hand, flexible resource models suggest that capacity is determined by a central resource pool that can be flexibly divided such that items of greater complexity receive a larger share of resources. On the other hand, if capacity in working memory is defined in terms of discrete storage “slots” then observers may be able to determine which items are assigned to a slot but not how resources are divided between stored items. To test these predictions, we manipulated the relative complexity of the items to be stored while holding the number items constant. Although mnemonic resolution declined when set size increased (Experiment 1), resolution for a given item was unaffected by large variations in the complexity of the other items to be stored when set size was held constant (Experiments 2–4). Thus, resources in visual working memory are distributed in a discrete slot-based fashion, even when inter-item variations in complexity motivate an asymmetrical division of resources across items.
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